Practical Data Acquisition For Instrumentation And Control Systems 'link'

: These devices detect physical phenomena and convert them into electrical signals (voltage or current). Common examples include thermocouples for temperature, strain gauges for pressure, and accelerometers for vibration.

You observe 0.2 mA of ripple on a 4-20 mA pressure loop. That is 5% error (0.8 psi on a 100 psi sensor). Solution: Install a passive low-pass filter (resistor + capacitor) or enable the 50/60 Hz notch filter on your DAQ input. : These devices detect physical phenomena and convert

Modern I&C systems produce terabytes of data. Storing everything raw is expensive and slow. Use practical compression. strain gauges for pressure